微信小程序注册完整实例，发送短信验证码，带60秒倒计时功能，无需服务器端。效果图:

代码:

index.wxml

!--index.wxml--view class="container"  view class='row'     input placeholder='请输入姓名' bindinput='bindNameInput'/   /view  view class='row'     input placeholder='请输入手机号' bindinput='bindPhoneInput'/   /view  view class='row'     input placeholder='请输验证码' bindinput='bindCodeInput' style='width:70%;'/      button class='codeBtn' bindtap='getCode' hidden='{{hidden}}' disabled='{{btnDisabled}}'{{btnValue}}/button  /view  view     button class='save' bindtap='save' 保存/button  /view/view

index.js

//index.jsvar zhenzisms = require('../../utils/zhenzisms.js');//获取应用实例const app = getApp();Page({  data: {    hidden: true,    btnValue:'',    btnDisabled:false,    name: '',    phone: '',    code: '',    second: 60  },  onLoad: function () {  },  //姓名输入  bindNameInput(e) {    this.setData({      name: e.detail.value    })  },  //手机号输入  bindPhoneInput(e) {    console.log(e.detail.value);    var val = e.detail.value;    this.setData({      phone: val    })    if(val != ''){      this.setData({        hidden: false,        btnValue: '获取验证码'      })    }else{      this.setData({        hidden: true      })    }  },  //验证码输入  bindCodeInput(e) {    this.setData({      code: e.detail.value    })  },  //获取短信验证码  getCode(e) {    console.log('获取验证码');    var that = this;    zhenzisms.client.init('https://sms_developer.zhenzikj.com', 'appId', 'appSecret');    zhenzisms.client.send(function (res) {      if(res.data.code == 0){        that.timer();        return ;      }      wx.showToast({        title: res.data.data,        icon: 'none',        duration: 2000      })    }, '15811111111', '验证码为:3322');  },  timer: function () {    let promise = new Promise((resolve, reject) = {      let setTimer = setInterval(        () = {          var second = this.data.second - 1;          this.setData({            second: second,            btnValue: second+'秒',            btnDisabled: true          })          if (this.data.second = 0) {            this.setData({              second: 60,              btnValue: '获取验证码',              btnDisabled: false            })            resolve(setTimer)          }        }        , 1000)    })    promise.then((setTimer) = {      clearInterval(setTimer)    })  },  //保存  save(e) {    console.log('姓名: ' + this.data.name);    console.log('手机号: ' + this.data.phone);    console.log('验证码: ' + this.data.code);     //省略提交过程  }})

index.wxss

/**index.wxss**/page{  height: 100%;  width: 100%;  background: linear-gradient(#5681d7, #486ec3);  display: flex;  flex-direction: column;}.container{  display: flex;  flex-direction: column;  justify-content: space-around;  width: 90%;  margin: 50rpx auto;}.row{  position: relative;  height: 80rpx;  width: 100%;  border-radius: 10rpx;  background: #fff;  margin-bottom: 20rpx;  padding-left: 20rpx;  box-sizing: border-box;}.row input{  width: 100%;  height:100%;}.codeBtn{  position: absolute;  right: 0;  top: 0;  color: #bbb;  width: 30%;  font-size: 26rpx;  height: 80rpx;  line-height: 80rpx;}.subBtn{  width: 200rpx;  height: 80rpx;  background: #fff;  color: #000;  border-radius: 50rpx;  line-height: 80rpx;}

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详情参考: http://smsow.zhenzikj.com/doc/sdk.html